The maximum power dissipation of the TPA721DGNR is 2.5W. However, this value can be limited by the thermal resistance of the package and the PCB, so it's essential to consider thermal management in the design.
The gain setting of the TPA721DGNR can be optimized by selecting the appropriate gain resistor (Rg) value. A higher Rg value results in higher gain, but also increases the noise floor. A good starting point is to use the recommended Rg value from the datasheet and then adjust based on the specific application requirements.
To minimize electromagnetic interference (EMI) and ensure optimal performance, it's recommended to follow a star-grounding layout, keep the input and output traces separate, and use a ground plane to reduce noise. Additionally, place the amplifier close to the power supply and use decoupling capacitors to filter the power supply noise.
To protect the TPA721DGNR from overvoltage, use a voltage regulator or a transient voltage suppressor (TVS) to limit the input voltage to the recommended maximum of 12V. For overcurrent protection, add a current-limiting resistor or a fuse in series with the power supply to prevent excessive current draw.
To ensure stable operation, decouple the power supply with a 10uF capacitor in parallel with a 100nF capacitor, placed as close as possible to the amplifier's power pins. This helps to filter out high-frequency noise and reduce electromagnetic interference (EMI).
TPA721DGNR datasheet
by Texas Instruments
